Hi Charlotte,
These atlases are in standard MNI space. You need to obtain a transformation from diffusion to standard space to utilize them. I would go through the Registration practical from the FSL course (http://www.fmrib.ox.ac.uk/fslcourse/lectures/practicals/reg/index.html) to familiarize with the registration tools (see e.g. standard space masking). Then, you can register the DTI images to anatomic and the latter to standard space, in order to obtain a two-step transform from DTI-> standard space.
Cheers,
Stam
On 14 Jan 2011, at 11:51, SUBSCRIBE FSL Anonymous wrote:
> Dear FSL users,
>
>
> I am working on a cohort of subjects (150). I have two types of scans: anatomic and DTI.
> I always work with a voxel-based approach but I would like to work with a Region Of Interest approach.
> I know that athlases are accessible in FSL, like the JHU white-matter tractography atlas and that 20 structures were identified probabilistically.
> I would like to know if it is possible to use directly these ROIs to extract values of volume, FA or MD and how it is possible. I don't find any clue for that. I'm not an expert for using FSL so I have some difficulties!
> Could somebody help me?
> Thanks,
> Charlotte
>
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